UV/VUV excited photoluminescence of Tb3+ doped LaPO4 green emitting phosphors for PDP applications

被引:8
|
作者
Singh, Vijay [1 ]
Kumar, Ashwini [2 ]
Mehare, Chaitali M. [3 ]
Jeong, Hoonil [1 ]
Dhoble, S. J. [3 ]
机构
[1] Konkuk Univ, Dept Chem Engn, Seoul 05029, South Korea
[2] Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa
[3] RTM Nagpur Univ, Dept Phys, Nagpur 440033, Maharashtra, India
来源
OPTIK | 2020年 / 206卷
基金
新加坡国家研究基金会;
关键词
Co-precipitation; Powder XRD; Tb3+ ions; LaPO4; Photoluminescence; PDP; ENERGY-TRANSFER; ENHANCEMENT;
D O I
10.1016/j.ijleo.2019.163733
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
La1-xPO4:xTb (x = 0.01 <= x <= 0.11) phosphors were synthesized using conventional co-precipitation method. The powder X-ray diffraction confirmed the pure phase formation of LaPO4 host material. Upon ultra-violet (UV) excitation and vacuum ultra-violet (VUV), the phosphor showed a dominant green emission band centered at 544 and 545 nm, respectively due to the D-5(4) -> F-7(5) transition of Tb3+. The concentration quenching phenomena occurred when Tb3+ concentration was beyond 0.09 mol and this quenching mechanism could be explained by the dipole-dipole interaction. The optimal concentration was found to be 0.09 mol of Tb3+ ion. The CIE chromaticity coordinates of the optimized (La0.91PO4:0.09Tb) phosphor was determined to be (0.265, 0.567). All the analyzed results confirms that the La1-xPO4:xTb (x = 0.01 <= x <= 0.11) phosphors can find possible applications as promising green-emitting phosphor in near UV and VUV used in plasma display panels.
引用
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页数:7
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